<!doctype>
<html>
	<head>
		<script>

let s = '𠮷a';
let b = s.substring(0,2);
let c = s.substring(0,1); 
let d = s.codePointAt(1);
let e = s.codePointAt(2);
alert(c);
alert(b);
alert(d);
alert(e);
		</script>
	</head>
	<body>
			
	</body>
</html>